Picture this: a small audience is quietly ushered into a darkened room. They gasp in awe, as a brilliant night sky shines above. They wonder – as many after them will do – what trickery has made the roof above their heads disappear?
But this is a performance; the stars above an ingenious projection. For the first time a public audience has experienced the spectacle of the opto-mechanical planetarium. The location is the newly opened Deutsches Museum in Munich, built to celebrate science and technology. The date is May 7 1925.
